1185667961 has 2 divisors, whose sum is σ = 1185667962. Its totient is φ = 1185667960.

The previous prime is 1185667937. The next prime is 1185667991. The reversal of 1185667961 is 1697665811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1162810000 + 22857961 = 34100^2 + 4781^2 .

It is a cyclic number.

It is not a de Polignac number, because 1185667961 - 2³⁰ = 111926137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1185667991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592833980 + 592833981.

It is an arithmetic number, because the mean of its divisors is an integer number (592833981).

Almost surely, 2^1185667961 is an apocalyptic number.

It is an amenable number.

1185667961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1185667961 is an equidigital number, since it uses as much as digits as its factorization.

1185667961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 1185667961 is about 34433.5296041518. The cubic root of 1185667961 is about 1058.4110407544.

The spelling of 1185667961 in words is "one billion, one hundred eighty-five million, six hundred sixty-seven thousand, nine hundred sixty-one".